mirror of
https://github.com/moparisthebest/xeps
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208 lines
8.2 KiB
XML
208 lines
8.2 KiB
XML
<?xml version='1.0' encoding='UTF-8'?>
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<!DOCTYPE xep SYSTEM 'xep.dtd' [
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<!ENTITY % ents SYSTEM 'xep.ent'>
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%ents;
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]>
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<?xml-stylesheet type='text/xsl' href='xep.xsl'?>
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<?xml-stylesheet type="text/css" href="xmpp.css"?>
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<xep>
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<header>
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<title>Mediated Information eXchange (MIX): Co-existence with MUC</title>
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<abstract>This document defines an extension to Mediated Information eXchange (MIX) specified in XEP-0369. It specifies how MIX and MUC can be operated together. </abstract>
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&LEGALNOTICE;
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<number>0408</number>
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<status>Experimental</status>
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<type>Standards Track</type>
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<sig>Standards</sig>
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<approver>Council</approver>
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<dependencies>
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<spec>XMPP Core</spec>
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<spec>XMPP IM</spec>
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<spec>XEP-0004</spec>
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<spec>XEP-0030</spec>
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<spec>XEP-0054</spec>
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<spec>XEP-0060</spec>
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<spec>XEP-0084</spec>
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<spec>XEP-0128</spec>
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<spec>XEP-0198</spec>
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<spec>XEP-0292</spec>
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<spec>XEP-0297</spec>
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<spec>XEP-0313</spec>
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<spec>XEP-0372</spec>
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</dependencies>
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<supersedes/>
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<supersededby/>
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<shortname>MIX-MUC</shortname>
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&ksmithisode;
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&skille;
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<revision>
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<version>0.1.0</version>
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<date>2018-05-21</date>
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<initials>sek</initials>
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<remark><p>
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Split out from MIX 0.10.0;
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</p></remark>
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</revision>
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</header>
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<section1 topic='Introduction' anchor='intro'>
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<p>The Mediated Information eXchange (MIX) protocol framework and core capabilities are specified in &xep0369; (MIX-CORE).
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MIX can be used independently of &xep0045; (MUC).
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</p>
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<p>
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It may be desirable to operate a service that provides MIX and MUC together. This specification specifies three options for achieving this.
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</p>
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</section1>
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<section1 topic="Supporting MIX and MUC together" anchor="mix-and-muc-together">
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<p>
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If both MIX and MUC are implemented, three approaches are noted.
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</p>
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<ol>
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<li>Entirely separate MIX and MUC implementation, with MIX and MUC using separate domains and MIX channels being completely separate from MUC rooms.</li>
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<li>Fully integrated MIX and MUC implementation, with MIX and MUC sharing a single domain and rooms/channels equivalent.</li>
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<li>Partially integrated MIX and MUC implementation, with MIX and MUC using separate domains, but all rooms/channel are common. This means that each MIX channel will have MUC room of the same name and same participants. </li>
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</ol>
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<p>The fully integrated approach would be transparent to clients. The following example shows how a service that supports MIX and MUC in a fully integrated manner would respond following the specification of &xep0369;:</p>
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<example caption="Client uses Disco to show fully integrated MIX and MUC support" ><![CDATA[
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<iq from='hag66@shakespeare.example/UUID-c8y/1573'
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id='lx09df27'
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to='mix.shakespeare.example'
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type='get'>
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<query xmlns='http://jabber.org/protocol/disco#info'>
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</iq>
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<iq from='mix.shakespeare.example'
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id='lx09df27'
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to='hag66@shakespeare.example/UUID-c8y/1573'
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type='result'>
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<query xmlns='http://jabber.org/protocol/disco#info'>
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<identity
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category='conference'
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name='Shakespearean Chat Service'
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type='text'/>
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<feature var='urn:xmpp:mix:core:0'/>
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<feature var='http://jabber.org/protocol/muc'/>
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<feature var='urn:xmpp:mix:core:0#searchable'>
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</query>
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</iq>
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]]></example>
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<p>In the fully integrated service item discovery on the MIX/MUC service determines a list of channels. The protocol used for this is the same in MUC and MIX. Discovery actions on a channel in MIX MUST use 'node=mix' attribute in the discovery which will lead to the return of MIX channel specific information, as mandated for this discovery in &xep0369;. If is not set, MUC room specific information is returned.
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</p>
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<p>For the partially integrated service, MIX servers will reference the associated MUC server and MUC servers will reference the associated MIX service. This will allow a client that only support MUC or only supports MIX to find the right server if it is given a reference to the other one. For a client that supports both MUC and MIX, it will enable the client to select its preferred service.
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For a MIX client, it will also be useful to know the MUC service, so that this information can be shared with a MUC client invitation.
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The following example shows how a MIX server identifies the associated MUC server. Note that MUC MUST NOT be advertized as a feature:
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</p>
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<example caption="Client uses Disco to find MUC server assocated with MIX server" ><![CDATA[
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<iq from='hag66@shakespeare.example/UUID-c8y/1573'
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id='lx09df27'
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to='mix.shakespeare.example'
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type='get'>
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<query xmlns='http://jabber.org/protocol/disco#info'>
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</iq>
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<iq from='mix.shakespeare.example'
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id='lx09df27'
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to='hag66@shakespeare.example/UUID-c8y/1573'
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type='result'>
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<query xmlns='http://jabber.org/protocol/disco#info'>
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<identity
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category='conference'
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name='Shakespearean Chat Service'
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type='text'/>
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<feature var='urn:xmpp:mix:core:0'/>
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<x xmlns='jabber:x:data' type='result'>
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<field var='FORM_TYPE' type='hidden'>
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<value>urn:xmpp:mix:muc:0#muc-mirror</value>
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</field>
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<field var='muc-mirror'
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type='jid-single'
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label='Location of MUC mirror service'>
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<value>chat.shakespeare.example</value>
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</field>
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</x>
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</query>
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</iq>
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]]></example>
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<p>The result is returned in an extended disco results in a form whose type value is 'urn:xmpp:mix:muc:0#muc-mirror'. The field with var='muc-mirror' is the value of which is the mirrored MUC domain's JID. </p>
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<p>Similarly, a MUC service can advertise an associated MIX doming. The following example shows discovery of a MUC domain. Note that MIX MUST NOT be advertized as a feature</p>
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<example caption="Client uses Disco to find MIX server assocated with MUC server" ><![CDATA[
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<iq from='hag66@shakespeare.example/UUID-c8y/1573'
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id='lx09df27'
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to='mix.shakespeare.example'
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type='get'>
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<query xmlns='http://jabber.org/protocol/disco#info'>
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</iq>
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<iq from='chat.shakespeare.example'
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id='lx09df27'
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to='hag66@shakespeare.example/UUID-c8y/1573'
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type='result'>
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<query xmlns='http://jabber.org/protocol/disco#info'>
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<identity
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category='conference'
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name='Shakespearean Chat Service'
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type='text'/>
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<feature var='http://jabber.org/protocol/muc'/>
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<x xmlns='jabber:x:data' type='result'>
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<field var='FORM_TYPE' type='hidden'>
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<value>urn:xmpp:mix:muc:0#mix-mirror</value>
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</field>
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<field var='mix-mirror'
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type='jid-single'
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label='Location of MUC mirror service'>
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<value>mix.shakespeare.example</value>
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</field>
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</x>
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</query>
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</iq>
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]]></example>
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<p>The result is returned in an extended disco results in a form whose type value is 'urn:xmpp:mix:muc:0#mux-mirror'. The field with var='mix-mirror' is the value of which is the mirrored MIX domain's JID. </p>
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<section2 topic="Choosing Which Invite to Send" anchor="mix-muc-invite-choice">
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<p>
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Where a client supports MUC and MIX and has determined that for a channel that the server also supports a MUC room, the client has a choice as to which type of invite to send. This SHOULD be done by determining if the client support MIX using the mechanism specified in
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&xep0369;. If the client supports MIX a MIX invite SHOULD be sent.
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</p>
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</section2>
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</section1>
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<section1 topic='Internationalization Considerations' anchor='i18n'>
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<p>See considerations in &xep0369;.
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</p>
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</section1>
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<section1 topic='Security Considerations' anchor='security'>
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<p>See considerations in &xep0369;.</p>
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<p>
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When converting a 1:1 conversation to a channel there is potential to expose sensitive information and to present invalid information.
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</p>
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</section1>
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<section1 topic='IANA Considerations' anchor='iana'>
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<p>None.</p>
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</section1>
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<section1 topic='XMPP Registrar Considerations' anchor='registrar'>
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<p>The urn:xmpp:mix namespace needs to be registered.</p>
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</section1>
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<section1 topic='XML Schema' anchor='schema'>
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<p>To be supplied when MIX progresses to proposed standard.</p>
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</section1>
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<section1 topic='Acknowledgements' anchor='ack'>
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<p>See &xep0369; for a list of contributors to the MIX Family of specifications.</p>
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</section1>
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</xep>
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